Developing a REST API with Go and Cloud Run

Developing a REST API with Go and Cloud Run

Learn how to develop a REST API using Go and deploy it on Google Cloud Run.

Explore the benefits of using Go for building web applications and APIs, as well as the advantages of using Cloud Run for serverless deployment.

Follow the steps outlined in this post to easily build and deploy your own REST API on Google Cloud Run.

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Developing a REST API with Go and Cloud Run

As technology continues to evolve, developers are constantly exploring new ways to build and deploy applications.

One popular approach is the use of cloud services, which provide scalable and flexible infrastructure for hosting applications.

In this article, we will explore how to develop a REST API using Go and deploy it on Google Cloud Run.

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Why Go and Cloud Run?

Go, also known as Golang, is a powerful programming language developed by Google.

It is known for its simplicity, efficiency, and strong support for concurrency.

Go is a great choice for building web applications and APIs due to its fast execution speed and low memory footprint.

Cloud Run, on the other hand, is a fully managed serverless platform provided by Google Cloud.

It allows you to run stateless containers that automatically scale up or down based on incoming requests.

Cloud Run eliminates the need to manage infrastructure and provides a cost-effective solution for running your applications.

Setting Up the Development Environment

Before we start building our REST API, we need to set up our development environment. Here are the steps:

1. Install Go: Visit the official Go website and download the latest version of Go for your operating system. Follow the installation instructions to complete the setup.
2. Install Docker: Docker is required to build and run containers. Download and install Docker from the official Docker website.
3. Install the Cloud SDK: The Cloud SDK provides the necessary tools to interact with Google Cloud services. Follow the instructions on the Google Cloud documentation to install the Cloud SDK.
4. Create a Google Cloud project: Visit the Google Cloud Console and create a new project. Make note of the project ID as we will need it later.

Building the REST API

Now that our development environment is set up, let's start building our REST API using Go. Here are the steps:

1. Create a new directory for your project: Open your terminal and navigate to the directory where you want to create your project.
2. Run the following command to create a new directory:

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mkdir my-rest-api
cd my-rest-api
        

1. Initialize a new Go module: Run the following command to initialize a new Go module:

go mod init github.com/your-username/my-rest-api
        

1. Create the main.go file: Use your favorite text editor to create a new file named main.go. This file will contain the code for our REST API.

Here's an example of how the main.go file might look like:

package main

import (
	"fmt"
	"log"
	"net/http"
)

func main() {
	http.HandleFunc("/", helloWorld)
	log.Fatal(http.ListenAndServe(":8080", nil))
}

func helloWorld(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Hello, World!")
}
        

In the above code, we define a simple HTTP handler function named helloWorld, which writes "Hello, World!" as the response.

We then register this handler function with the default HTTP server and start the server on port 8080.

Deploying the REST API on Cloud Run

Now that our REST API is ready, let's deploy it on Cloud Run. Here are the steps:

1. Build the Docker image: Run the following command to build the Docker image for your REST API:

docker build -t gcr.io/your-project-id/my-rest-api .
        

1. Push the Docker image to Google Container Registry: Run the following command to push the Docker image to Google Container Registry:

docker push gcr.io/your-project-id/my-rest-api
        

1. Deploy the container on Cloud Run: Run the following command to deploy the container on Cloud Run:

gcloud run deploy --image gcr.io/your-project-id/my-rest-api --platform managed
        

Replace "your-project-id" with your actual project ID.

Conclusion

In this blog post, we learned how to develop a REST API using Go and deploy it on Google Cloud Run.

We explored the benefits of using Go for building web applications and APIs, as well as the advantages of using Cloud Run for serverless deployment.

By following the steps outlined in this post, you can easily build and deploy your own REST API on Google Cloud Run.

Remember to clean up your resources after you are done experimenting with Cloud Run to avoid unnecessary charges.

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You can delete the Cloud Run service and the associated container image from Google Container Registry.

Happy coding!

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